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(No Model.)

G. P. FULLER.

"NUT Loox. No. 338,729. Patented Mar. 30, 1886.

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UNITED STATES PATENT OEEicE.

GEORGE PEFULLER, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE HALF TOANDREV A. KELLY, OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 338,729, dated March30, 1885.

Application filed May 19,1885.

T0 @ZZ whom it may concern:

Be it known that I, GEORGE P. FULLER, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented a new and useful Improvement in Nut-Locks, ofwhich the following is a specification, reference being had to theaccompanying drawings.

This invention relates to nutlocks fand it has for its object to providea device of this character which will have a double lock ing action, soas to hold the nut firmly in its place and prevent it from turning.

IVith this end in view this said invention consists in the peculiarconstruction and combination of devices that will be hereinafter morefully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective viewillustrating one of the modes of application of my improved nutlock.Fig. 2 is a vertical transverse section of the same. Fig. 3 is a detailview of the inner serrated washer. Fig. 4 is a detail view ofthe outerwasher-plate, having slitted points to turn up against the side ofthenut. Fig. 5 is a detail sectional view illustrating the peculiar mannerof fitting the two washers together, so as to hold them from movingindependently of each other.

Like letters are used to indicate corresponding parts in the severalfigures.

Referring to the drawings, it will be seen that I have shown the lock inits application to rail-joints, in which A is the bolt, B the rail, Othe fish-plate, and D the nut.

E designates a circular washer, having a central opening for the passageof the bolt, and provided on its inner face with a series of serrationsor raised projections, forming a rasp-surface, as at c, which engages orbears against the fish-plate to hold said washer from turning. On theouter face of the washer, at points diainetrically opposite each otheraround the bolt-hole, are provided rectangular depressions b, for thepurpose hereinafter eX plained.

F designates the outer washer-plate, which Serial N0. 166,007.

(No model.)

at points diametrically opposite each other, the body of the plate ispressed inward to provide rectangular projections d, which, when thewasher is in its normal position, fit within the recess b of the innerwasher, E, and thus the outer washer will be held from turning whenscrewing on the nut. plate F is circular in form, and is larger indiameter than the nut, the outer periphery or edge of the washer-platebeing slitted diagonally, as at e, so as to form pointsf, any one ofwhich may be bent or turned upward or outward against theside of the nutto lock it from further movement.

The operation of my invention will be readily understood from theforegoing description, taken in connection with the annexed drawings.After the bolt has been passed through the rail and fish-plate the innerwasher, E, is passed over the threaded end of the bolt so that its innerserrated face will come in contact with the surface of the fishplate andtake a trm hold against the same. The outer thin washer-plate, F, isthen placed over the bolt so that the projections d will register withand be received in the recesses or depressionsb of the inner washer.rlhe nut is then turned over the threaded end of the bolt so as to comeagainst the outer washer, F, against which it bears, and holds it incontact with the inner washer, E. By this action of the nut theprojection d will be held within the recesses b of the inner washer, andthus both Washers will be prevented from moving when turning on the nut,which, when it has reached the limit of its movement, may be held fromturning by bending up or out any one of the points f against the side ofthe nut. It will be understood that where greater security is needed thepointsf may be bent or turned out to come up against all sides of thenut; but in practice it has been found that one point will serve as anefficient lock for the purposeintended. Theinner washer is thicker thanthe outer washer, and is constructed of steel, and hardened to such adegree that the rasp-surface will take a rm hold upon the part to whichthe nut-lock is applied.

It will be seen that when applying the nutlocking device the washers areplaced on the bolt in such position that when the nut has The washer-ICO and outer washers is necessary to retain the i parts in their properrelative positions. The

inner and outer washers cannot be formed in one piece, though in so mecases a si ngle washerplate made of untempered iron or steel with theslotted pointsf around its edge, and provided with a raspsurface on theside opposite the nut, may be used where it is not necessary to employ astrong lock. Ordinarily I use the nut-lock herein shown and described.The thick inner washer with the rasp-surface will readily withstand thestrain that is placed upon it. As the rasp-face binds by indenturealone, there will be no necessity of providing slots or holes (whichoftentimes become clogged) in the fish-plate, and besides theraspfaceforms a more efficient lock, as it binds at all parts thereof. It can beslipped over the bolt without the necessity of making any previousadjustment. I therefore lay special claim on the rasp-surface oftheinner washer. The reason why the two washers are formed separately isthat were they formed in one solid piece sufficiently thick to withstandthe strain the points could not be bent up against the side of the nut.Were they made thin to allow bending, then a very weak lock would beprovided, and such as would be of little service on railroads or otherheavy structures. The solid iron tempered inner washer with therasp-face could not be combined with the untempered thin outer Washer.VTheymust be made separate; but, as it is desired to hold them frommoving, the connection shown andA described is employed t0 effect thisend.

It will be understood that by combining the two Washers, as shown anddescribed, an eiii cient and serviceable lock for nuts is provided,inasmuch as the inner washer will bind iirmly against the part to whichthe lock is applied, while the outer washer will serve to check the nut,and also will be held from lmoving independently of the inner washer.

I do not wish to limit myself to any particular application of myimproved lock, for it is apparent that it may be applied to allmachinery where it is desired to hold nuts from turning-as, forinstance, on reapers, cars, bridges, and other wood surfaces.

Having described my invention, I claim- 1. The herein-describednut-locking device, comprising the inner serrated Washer having a seriesof depressions or recesses and the outer washer-plate having acorresponding number of projections tov enter the recesses of the innerWasher, the edge of the outer washer being` provided with points whichmay be turned up against the side of the nut, as setv forth.

2. rIhe bolt, in combination with theinner washer having a serrated orrasp inner face t0 bindby indentation alone against the part to which itis applied, a series of ydepressions or recesses formed in the outerface of the inner washer, and the outer washer-plate .provided with acorresponding number of projections to enter the recesses and having anumber of points on its edge to be turned up against the side ofthe nut,as set forth.

3. The herein-described nut-locking device, comprising the inner thickwasher having sharp-pointed projections extending from its entire innerface forming a rasp-surface, the

several pointed projections each binding byv indenture alone against thepart to whichthe lock is applied, so as to avoid the necessity ofproviding holes or openings for the reception of the projections, andthe outer thinplate or washer larger than the inner washer and providedwith a series of points any one of which may be turned out againsttheside of the nut, and means, substantially as described, for holding theouter washer from turning inde-l pendently of the inner washer afterthey have been adjusted in position, and yet allowing the said washersto move independently while the adjustment is being effected, as setforth.

In testimony that I claim the foregoing as my own I have hereto axed mysignature in presence of two witnesses.

GEORGE4 r. FULLER..

Witnesses:

J. A. TEMPLE, J oHN CAMPBELL.

